[DeltaP]

Head gasket failures on that year and up to '08 are common. Supposedly they've got that fixed now. Take it back to them to have it put on a lift and check that oil leak. Even if it's repair residue they're responsible for cleaning it up. You need to get another estimate from another repair shop for the mounts replacement. Also check out the prices of the mounts on Rock Auto.com to compare. Most shops will mark up parts they supply.